Power-press



L. SAM ETZ.

POWER PRESS.

APPLICATION FILED OCT. 7.. I920.

Patented Sept. 13, 1921.

2 SHEETS-SHEET I.

i r/vmvron I Lao 13 fame Z? By pa) w ATTORNEVSK L. SAME'T'Z; POWERPRESS.

APPLICATION FILED OCT-J, I920.

Patented Sept; 13, 1921.

2 SHE'ETSSHEET 2.

W M M W nnrr ' Louis 'sAME'Tz, "or BaooK'LYm NEVV'YORK.

To' alien/lam if only concern) 7 J to it known that I, LoUIs Sm ig'rz, acitizen of the U ited. States, residing at llrooklyrhir the county-ofKings and, State of New Ya-1:, have invented certain new and usefulIuipro'Venients in Power-Presses; and lilo hereby declare the following30 be a full, clear-hand exact description of the in- Yen-tion, such aswill enable others skilled in vthe artto which it appertains to make anduse the same, referencebeing had to the accompanying drawings, and :tocharacters. of reference marked thereon, which form a part ofthisjspecification; v The present invention-relates, generally, toimproi'ements in power presses; and the intention has i'eferencmmoreparticularly, to an improved. construction of power press for moldingand shaping plastic material, such, for example as celluloid, etc. 5

The invention has for its principal 0bjectto proride a press foroperating male and female shaping dies, under proper timed controlwherebyQthe dies are automatically held underadequate pressure in mutualcoa operation for a desired periodoftime, and

thei sepa rated for the removal of the article formed thereby i f 2 F VAnother ob] ect of the invention is v to proride a 110Y0l'1l1621n5 forreciprocating one of the dies in combinationwith a positive automaticmeans for forcing the dies apartwhen separating or opening the same forthe removal of the articlelformed thereby,

, Other objectsofthe presentinvention, not at this time moreparticularly enumerated, will be clearly understoodfromthe follow ingdetailed description ofthe same.

it 1th the'various objects of the'present invention in ,riew, the sameconsists, primarily, in the novel: construction of reciprocating powerpress hereinafter set forth and, the invention consists, furthermoreinthe novel arrangements; and combinations of tlievarious devicesnndparts,as well as in the details of, the construction of, the same, all ofwhich will hereinafter more fully describechand then finally embodiedintheclaims appended hereto. 7

Theiinrention is'clearly illustrated in the accompanying drawings, inwhich a Figure 1 is a side elevation ofthe novel. construction of pressmade according to and embodying the principles of the present in-.*ention;'Fig 2, is a front elevation of the same; Fig. 3wis atransverse Yertic'al section v POWER-PRESS.

Specification of Letters Patent. -Patented Se t 13 1921 -Applicationfiled October '7, .1920. sens n 415,297. 1 i

through the same, taken on line 3.,-3 in said Fig. 1; Figs is a' detailhorizontalsection, taken on line'l4 in said Fig. 1; and Fig. '5jis adetail-View illustrating tlieoperation of the" mechanism designed topositivelyactuate the separation of the dies operated by the pressfl-qSimilarcharacters of reference are employed inall of the hereinabovedescribed views, to indicate corresponding parts.

. Referring now to .said drawings, the reference c aracter 1 indicates asuitable baseplate or bednpor which the pressgis mounted. FlXGCluponsaid base'plate or bed 1 area pair ofside frames orsta-ndards 2upon'and by which themovingpartsof the press mechanism are supported.-Secured to, said. side frames onstandards at their fr ntends-and' so asto extend between the.

same, is a front plate 3 provided with suitbetween 'whieh is guided, forvertical reciprocatory movement, a cross-head plate 5, to

:pivotally co'nnectedjthelower end of a fcon necting rod 9. l r Mountedin bearing portions- 10; formed ably formed-Vertical 'guideway members4-,

in the upper portions ofsaidsideframes v or standards 2Jis a transverserock-shaft 11 upon whichis fixed a lever member 12, the forwardyendofwhich 1s'-prov1declwv1tl1 a a bifurcated portion 01'= fork 13 1n whichis supported a wrist pin flat to which is pivot-' ally secured theupperbend of said connecting 'rod tlfi The rearward end ofsaid levermember 12 iisiprovided with a similar bifur:

cate'd port-ion lo for journalingan axle pin '16 upon which is rotatablymounted an antifriction roller 17;. 1 3 Formed-in the upper portionsofthe rearwardends of said side frames or standards 2 are bearingmembers 18, in which is'journailed a transversefcam shaft-19. Fixedonsaid cam -'shaft 19 isa cam member 29, upon the peripheryof whichridesthe-antifriction roller 1710f said-lever member 12.

The means for maintaining thelever member 12 under such control. as'toassure the riding. contact of: its anti-friction rollerwl'l 'Wltll theperiphery of said cam member 20, comprises a rearwardly pro ecting arm21 which is fixed on said rock-shaft '11, and

' llichis provided adjacent to its free end the weight tends to normallyswing d wnward the arm 21 whereby the rockshaft normally tends to rotatein SllClL'tlll-QGf tion as to swing the rear end of said lever nember 12downward, so as to ,press said anti-friction roller 17 in constantengagement with the periphery of said" cam member 20. 7

The transmission means for driving said cam-shaft 19 comprises astud-shaft 23 which projects outwardly from one of said side frames orstandards 2', and upon which is mounted a loose pulley 24 adapted to bedriven by a belt (not shown). Slidably mounted on said stud-shaft 23 isa rotatable clutch-sleeve 25-, from the outer face or end of whichproject clutch pins26, which, when said clutch-sleeve is moved towardthe pulley 24, are engageable in clutch sockets 27 connected with saidpulley, so that the rotary motion of said pulley is transmitted to saidclutchsleeve. Fixed on the inner end of said clutch-sleeve 25 is apinion 28, which rotates with said clutch-sleeve. Said side frame orstandard 2 which is provided with the stud-shaft 23 is also providedwith an additional bearing member 29 in which is journaled anintermediate shaft 30; Fixed on the outer endof said shaft 30 is a gearwheel 31 whichmeshes with and is driven by said pinion 28, and fixed onthe inner end ofsaid shaft 30 is a pinion Fixed on saidcamshaft 19 is agear wheel 33 which meshes with and is driven by said pinion 32.

Themeans for operating the clutch sleeve 25, and automatically releasingthe same to stop the' 'rotat-ion of the cam member 20 when the samecompletes a revolution. comprising a transverse shift-bar 84 which ismounted for longitudinal movement in bearing or guide openings providedin said side frames or standards 2, so as to be disposed parallel to andforward of said camshaft 19. Said shift-bar is provided at one end witha yoke-arm 36' having a forkportion or yoke 37 which embraces saidclutch-sleeve in an annular groove or channel 88 formed in the latter.Said shift-bar 34 is normally moved or shifted from right to left bymeans of a compression spring 39 which is arranged between a side frameor standard 2 and a collar 40 fixed upon said shift-bar. said'shift-bar,as actuated by the spring 39 tends to slide said clutch sleeve 25 intooperative-clutched relation to the driving pulley 24. Normally saidshift-bar is held in retracted position, against the tension of saidspring 39, and so as to hold the clutch-sleeve in released position, bymeans of a pivoted stop-lever 41 which is mountedupon the exterior sideof the right hand side frame or standard 2, said stop-lever 41 norm-allyen- The normal sliding movement of gaging a stop-collar 42 fixed on theouter right hand end ofsaid shift-bar. Said stoplever is normallymaintainedin and returned to operative position relative to said stopcollar 42 by means of a pull spring 41 which tends to constantly move orswing thestoplever downwardly toward the shift-bar. Said stop-lever isprovided with an upturned handle portion 43 at its forward end formanipulating the same.

hen it is desired to start the operation of the machine-by throwing inthe clutch mechanism, the stop-lever 41 is swung up wardly bypullingforward the handle portion 43', thus disengaging the same from the stopcollar 42, whereupon the spring 39 will cause the shift-bar to move fromright to. left and thereby move the clutchrsleeve 25 into clutchedrelationTto the pulley 24. Upon this occurrence the movement of thepulley will be transn'iitted to the clutch-sleeve and its pinion 2S, andthence through the gear 31.v intermediate shaft-30, pinion 32 and gear33 to the cam shaft 19. thus rotating the latter and causing theoperative rotation of the ram member 20'. Since it is desirable that themachine be automaticallystopped when the cam member 20 completes onerevolution, the following means is provided for accomplishing suchresult. Mounted-onthe side or inner face of said gear 33 is a camprojection 44, and: fixed on said shift bar 34 is a retractor arm 45which projects outwardly from the shift bar 34 toward the cam-shaft 19..lVhen' said shift bar moves to clutch throwing position, said r'etractorarm shifts to a position disposing the same in the path of rotation ormovement of said cam projection 44. As the cam shaft-19 approaches thecompletion of one revolution,

the cam projection 44 iscarri'ed around by the gear 33 into operativeengagement with said ret'ractor arm 45, whereby the latter is pulley 24so that the transmission mechanism is stopped and the camshaft 19 andits cam member 20 brought to rest upon the completion of a singlerevolution of the latter, but

the stop-collar 42 is also carriedfoutwardl-y so that the actuatingspring 41 may again swing downwardly the stop lever 41 behind the: stopcollar 42, thus again holding the shift bar against the clutch operatingmovement and thus bringing the machine to rest with all. itsmechanismsin normal initial or starting positions.

Fixed on thebaseplate or bed 1 is a stationary female die 46' with whichthe vertically reciprocated male, die 6 cooperates.

in operation, when the machine is at rest.

the material to be molded or shaped by the dies 6 and 46, is placed inthe female. die 46.

The machine is then put' 'inmotion so that.

power is transmitted to the cam shaft, as above'described, whereupon thecam member is rotated. The periphery of said cam member is shaped-toprovide alifting portion 47', a concentric dwelling portion 48, and adescending portion 49. As

the camshaft begins its rotation the lift-.

ing portioni47 of the cam member is carriedagainst the anti-frictionroller 17 of the lever member 12, causing the roller to ride upwardlythereupon and into engagement' with the dwelling portion 48, therebyrocking the lever member 12 so as to impart'to'the cross head plate 5 adownward movement which carries the male die 6 into cooperaive relationto'the'fema'le die arc of the dwelling portion 48 of the cam portion 20.Said dwelling port-ion48 of the cam member 20 terminates in thedescending- 46 and thematerial to be moldedor shaped.

be varied as desirecheither b var in the y l a speed of rotation of theshaft by altering the gearing relationsof the transmission mechanlsm. orby shortening or lengthening the portion 49, so that as the cammember 20approaches the end of a rev lution the-roller 17 will descend saiddescending portion thus permitting the lever member 12 torock back tonormal position, whereby the male die is returned to normalaaisedposition by the time a single revolution'of the cam is completed, andthe "rotation of the cam is thereupon stopped by the operation of theclutch shift bar mechanism above described.

'13 reason of the fact that the male die 6, when free to rise,'may tendto cleave to the molded or shaped material, so that the weight 92, whichslightly overbalances the weight of the cross-head plate 'and die'6, maynot be sufficient to overcome such adherence, it is desirable to providea means for positively producing an initial separation of the male die6'from the female die 46. The means serving such purpose comprlses alever device 50 which is fixed to said rockshaft 11 so as to dependtherefrom, and

which is provided with a rearwardly projecting integralarm 51 at its free end-having a laterally off-set socket portion or perforate ear 52 inwhich is secured the shank 53 of aconcave lip piece 54. Pivotallymounted upon a fulcrum stud 55 which projects from one side ofsaidcam-member 2-0 is'a'trip-memberc'56. A coil spring 5? having one endsecured to said cam-member and the opposite end secured to said tripmember 56,] tends to normally maintainthe latter in a position stopped-'against thehub of said eam'member, as 'shownin Fig. 1 of the'drawings; Wl1en -thelever member 12 is moved to operatedposition tocause they cooperation of the dies 6 and-46 the oscillation "ofrock-shaft ll swings said lever device,50 rearwardly so that the lippiece 54 is positioned in the path of the nosing or free end 58 of saidtrip member 56. -As

thercam-member 20 rotates said trip mem ber 56 is carried around untilby the time the rollerli' of'thelever member 12 rides upon thedescendingportion 49, said nosing or free end 58 of the trip member is movied intoengagement with the lip piece 54." Continued rotation of the'cam'member20 causes said trip member to push'upon the lever d evice 50, the tripmemberbeing free to turn upon its fulcrum stud 55'. In this 'manner apositive pressure is applied to said lever device 50jwhich swings thesame for Ward and thereby rocks said rock-shaft in the reverse directionto produce a positive liftingmovement'of the lever' member 12 relativeto the cross-head'plate 5 anddie 6 carried thereby, so that the die 6 ispositivelyforced apart'or separated from the material molded or shapedby the cotiperative action of the latter with the die 46;. Immediatelybefore the cam-member 20 completes its rotationthe trip-inember 56 freesitself from the piece 54, sothatthe J spring 57 returns said trip memberto normal initial position. In the'meantime the die 6 having beenforcibly separatedfromthe molded or shaped material the pull of gravityupon the 'weight22 is "sufficient to continue the returning-movement ofthe rock'shaft 11 and parts mounted thereonto normal initial position,-as' will be clearly understood. a v i q From the above description itwill be very apparentthat the construction ofpress involves a novel"combination of means for producing a timed cooperation of the moldingdies under adequate pressure assuring the proper: functioning of thesame, to-

gether with means for positively actuating the separating movements ofthe ches.

' I am aware that some changes may be made in the arrangementszandcombinations of the various devices and parts; as well as in the detailsof the construction of the same without departing from the scope of mypresent invention as set forth in the fore- Y going specification and asdefined in the appendedqclaims. Hence; I do not limit my 1 invention to:the exact arrangements and combinations. of the various devices andparts described in.saidspecificatiom nor do I confine myself to}--theexact details of the a construction of the said parts as'illustratedin the accompanying drawings.

I- claim p 1, In a device, of the kind described, a pair of dics,,meansfor mounting one die for vertical reciprocatory movement, aroc-kinglever for actuating said movable die, secondary lever device movablewith said rocking lever, a cam for'ac-t-uatingsaid rocking lever in onedirection to produce the op erative stroke of said movable die, and

means cooperating with said secondary lever device for actuating said'rockinglever in the opposite direction to positively and forciblyinitiate a separation of saidmovable die from the work after operation.

H 2. In a device of the kind described a fixed die, a supporting framework, .a' vertically movable die supported by said frame work forcooperation with said fixed die, a rocking lever for actuating saidmovable die, a rotary cam having a concentric dwelling portion foractuating said rocking lever, atransmission means for rotating said cam,means for automatically stopping said cam upon the completion of asingle revolution, and means for positivelyinitiating the re versemovement of said rocking lever to force the movable die from cooperativerelation with said opposite dic, comprising a lever device in fixedrelation to said rocking lever, and pivoted spring retained trip membercarried bysaid cam to engage and operate said lever device. r .3. In adevice of the, kind described, a base, Ln-frame work mounted on saidbase, a vertically reciprocable cross-head plate mounted on said frame,work,a movable die carried by said cross-head plate, a fixed diemounted onsa-idbase with which said movable dic coiiperates, a rockshaft jonrnaled.

in said frame work, a lever member hired on said rock shaft, aconnecting rod joining the forward'end'of said lever member withsaid'cross-headplate, a cam shaft journaled in said frame work, a camhaving a lifting portion, a concentric dwelling portion and a descendingportionat its periphery, said 'cam being adapted to operatively engagethe rear end of said lever member, means A. In a vdevice of the kind:described, a

for. connterbalancing base, a frame work mounted on said base, avertically reciprocable cross-head plate mounted on said frame work,amovable die carried by saidcross-head plate, a fixed die mounted onsaid base withwhich said movable die cooperatea'a rock shaft journaledin said frame work, a lever member fixed on. said rock shaft, aconnecting rod joining the forward end of said lever member with saidcross-head plate, a cam shaft journaled in said frame work, a camhaving; a lifting portion, a concentric dwelling portion and a,descending portionat its preiphery, said cam beingadapted to operativelyengage the rear end of said lever member, means said lever memberagainst the weight of said cross-head plate and its die, a stud shaftconnected with said frame work, a power driven pulley journaled on saidstud shaft, a clutch sleeve having a pinion slidable on said stud shaft,intermediate gear transmission means driven by said pinion to rotatesaid cam shaft, spring actuated means for moving said clutch sleeve intoclutchedrelation to said pulley. manually controlled stop means forholding said clutch sleeve operating means inactive, and means forautomatically returning said clutch sleeve operating means to clutchreleasing normal initial position, upon the completion of a singlerevolution of said cam, a second lever device fixcdon said rock shaft,and a pivoted springretained trip member carried by said canrtoengaggcand operate said lever device to positively initiate a reverseinovementof said rock shaft and parts connected therewith when said descendingportion of said cam rides into engagement with the rear ends of saidlever member; l

5. In a device of the kind described, apivoted lever member foractuating a vertically movable 'die, a cam shaft, and a-cam having alifting portion, a concentric dwellingportion and a descending portionat its periphery, said cam being adapted 'to engage the rear end 'ofsaid lever member to operate the same, a power transmitting pulley,

transmission means intermediate said'pul- 1 ley and said cam shaft, saidtransmissionv means including a clutch, means for actuating said clutch,manually controlled stop means for normally holding said clutch actuating means in clutch. releasing position, and means. forautomatically returning said clutch actuating means'to clutch releasingpositioneupon the completion of a single revolution of said cam. .7

6.7111 a device of the kind described, a

pivoted lever member for actuating a ver'-' the same, a powertransmitting pulley, transmission means intermediate said pulley andsaid cam shaft, said transmission means including a clutch, means foractuating said clutch, manually controlledrstop means for normallyholding said clutchactuating means in clutch releasing position, meansfor automatically returning said clutch ac tuating means to clutchreleasing position upon the completion of a single revolution of saidcam, a second leverdevice in fixed relation to said lever member, and apivoted spring retained trip member carried by said cam to engage andoperate said lever device to positively initiate a reverse movement ofsaid lever member for forcibly retracting said movable die when saiddescending por tion of said cam rides into engagement with said levermember. l

7. In a device of the kind described, a pivoted lever member foractuating a vertically movable die, a rotary cam means engageable withthe rear end of said lever member to produce the operative stroke of thelatter, means for normally maintaining the rear end of said lever memberin riding engagement with said cam means, and means for positively andforcibly initiating the return stroke of said lever member.

8. In a device of the kind. described, a pivoted lever member foractuating a vertr cally movable die, a rotary cam means engageable withthe rear end of said lever member to produce the operative stroke of thelatter, means for normally maintaining the rear end ofsaid lever memberin riding engagement with said cam means, and means for positively andforcibly initiating the return stroke of said lever member, com

prising a second lever device in fixed relatlon to sald lever member,and a plvoted spring positioned trip member carried by said cam means toengage and operate said lever device as said cam means approaches thecompletion of its rotary movement.

9. In a device of the kind described, a pivoted lever member foractuating a vertically movable die, a cam means having a liftingportion, a dwellingportion and a tie scending portion, said cam meansbeing engageable with the rear end of said lever member to produce theoperative stroke of the latter, means for normally maintaining the rearend of said lever member in riding engagement with said cam means, andmeans for positively and forcibly initiating the return stroke of saidlever member.

10. In a device of the kind described, a pivoted lever member foractuating a vertically movable die, a cam means having a liftingportion, a dwelling portion and a descending portion, said cam meansbeing engageable with the rear vend of said lever member toproducetheoperative stroke of the latter, means for normally maintaining therear end of said lever member in riding engagement with said cam means,a second leverdevice in fixed relation to said lever member, and apivoted spring retained trip member carried by said cam to engage andoperate said lever device to positively initiate a. reverse movement ofsaid lever member for forcibly retracting said movable die; when saiddescending portion of said cam rides into engagement with said levermember.

In testimony, that I claim the invention set forth above I have hereuntoset my hand this 29th day of September, 1920.

Witnesses: 7 r

GEORGED. RICHARDS, Anonrrr HAUsnN.

LOUIS saMnTz.

